mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 12:12:47 +01:00
60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
//=- llvm/CodeGen/AntiDepBreaker.h - Anti-Dependence Breaking -*- C++ -*-=//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the AntiDepBreaker class, which implements
|
|
// anti-dependence breaking heuristics for post-register-allocation scheduling.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_ANTIDEPBREAKER_H
|
|
#define LLVM_CODEGEN_ANTIDEPBREAKER_H
|
|
|
|
#include "llvm/CodeGen/MachineBasicBlock.h"
|
|
#include "llvm/CodeGen/MachineFrameInfo.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineRegisterInfo.h"
|
|
#include "llvm/CodeGen/ScheduleDAG.h"
|
|
#include "llvm/Target/TargetRegisterInfo.h"
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
|
|
/// AntiDepBreaker - This class works into conjunction with the
|
|
/// post-RA scheduler to rename registers to break register
|
|
/// anti-dependencies.
|
|
class AntiDepBreaker {
|
|
public:
|
|
virtual ~AntiDepBreaker();
|
|
|
|
/// Start - Initialize anti-dep breaking for a new basic block.
|
|
virtual void StartBlock(MachineBasicBlock *BB) =0;
|
|
|
|
/// BreakAntiDependencies - Identifiy anti-dependencies within a
|
|
/// basic-block region and break them by renaming registers. Return
|
|
/// the number of anti-dependencies broken.
|
|
///
|
|
virtual unsigned BreakAntiDependencies(std::vector<SUnit>& SUnits,
|
|
MachineBasicBlock::iterator& Begin,
|
|
MachineBasicBlock::iterator& End,
|
|
unsigned InsertPosIndex) =0;
|
|
|
|
/// Observe - Update liveness information to account for the current
|
|
/// instruction, which will not be scheduled.
|
|
///
|
|
virtual void Observe(MachineInstr *MI, unsigned Count,
|
|
unsigned InsertPosIndex) =0;
|
|
|
|
/// Finish - Finish anti-dep breaking for a basic block.
|
|
virtual void FinishBlock() =0;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|